Nearly 30 people were arrested during a two-day drug bust across five Washington counties targeting a Mexican drug cartel.

Federal officials said the cartel was bringing heroin, fentanyl, cocaine and methamphetamine into the state using a California business to launder the money and send it to Mexico.

“The dangerous pills containing fentanyl flowing through this pipeline operated by this Western Washington distribution network has been shut down,” Keith Weis, a Drug Enforcement Administration special agent, said in a statement.

On Wednesday and Thursday, more than 400 law enforcement officers served 51 warrants on more than 50 buildings and 35 vehicles.